The Saudis paid Pakistan to develop them and store them until necessary. Now the time has come to build the infrastructure, receive or develop, and eventually deploy.
See also:
Saudi Arabia Admits it Has NUCLEAR BOMBS; Will Test Within Weeks!
Saudi prince: Getting nukes an option if Iran breaks deal
Saudi Arabia says it won’t rule out building nuclear weapons

Saudi Arabia plans to build 16 nuclear power reactors by 2030.
Saudi Arabia is expected to actively seek nuclear weapons capability to counter Iran, which continues to advance its own nuclear program despite the nuclear deal with world powers, a report said.
“Saudi Arabia is in the early stages of nuclear development” and will only become “more active” in seeking nuclear weapons, according to a March 31 report by the Institute for Science and International Security, a Washington D.C.-based organization that monitors global proliferation issues.
The Obama administration’s claim that the nuclear deal with Iran would ease regional tensions has not materialized. Instead, Iran has more aggressively backed its terror proxies since the deal and continues to harass U.S. military assets and allies in the region. Continue reading